MX · MAGNACHIP SEMICONDUCTOR Corp

$3.33 -0.08 (-2.35%) At close · Aug 19

Market Cap

$132.17M

36.51M

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

Quarter:

Holders: 78

Total Value: $98,931,637

Total Shares: 20,973,200

Institutional Ownership Trend

26 quarters

Superinvestors Holding MX

All superinvestors →

Howard Marks $11,825,000 Prem Watsa $295,625

Holder Concentration

Across 78 13F filers · Δ vs Mar 31, 2026

Top Holder

12.0%

−2.5 pts

Top 5

41.2%

−3.2 pts

Top 10

64.0%

−0.5 pts

HHI

520

Broadly held−53

Quarterly Activity

vs Mar 31, 2026

New

Increased

Decreased

Sold Out

Unchanged

Holder count: +7

Institutional value: +79.7%

Shares held: +6.7%

Top Buyers

vs Mar 31, 2026

Institution	Added	Now Holds
Mega D. E. Shaw & Co., Inc.	+1,238,153	1,397,759
Mega TWO SIGMA INVESTMENTS, LP	+929,604	1,501,438
Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP	+747,753	802,003
Large RENAISSANCE TECHNOLOGIES LLC	+626,100	661,600
Mega JANE STREET GROUP, LLC	+616,708	666,477

Top Sellers

vs Mar 31, 2026

Institution	Sold	Now Holds
Mid OAKTREE CAPITAL MANAGEMENT LP	−349,858	2,500,000
Mega BlackRock, Inc.	−195,215	13,377
Mid BRIDGEWAY CAPITAL MANAGEMENT, LLC	−187,754	46,141
Mega MORGAN STANLEY	−166,319	544,125
Micro SILVERBACK ASSET MANAGEMENT LLC	−120,000	100,000

Top New Positions

vs Mar 31, 2026

Institution	Acquired	Value (USD)
Large Caption Management, LLC	1,330,090	$6,291,325
Large NOMURA HOLDINGS INC	1,000,000	$4,730,000
Large PEAK6 LLC	400,000	$1,892,000
Mega Qube Research & Technologies Ltd	382,383	$1,808,671
Large Trexquant Investment LP	285,909	$1,352,349

Top Sold-Out Positions

vs Mar 31, 2026

Institution	Previously Held	Last Value (USD)
Mega AMERIPRISE FINANCIAL INC	1,583,589	$4,434,049
Small IMMERSION CORP	1,383,402	$3,873,525
Mid Clearline Capital LP	1,114,590	$3,120,852
Small FIRST WILSHIRE SECURITIES MANAGEMENT INC	743,953	$2,083,068
Micro Cygnus Capital Advisors, LLC	733,954	$2,055,071

Filter: New 26 Increased 24 Reduced 22 Sold out 19 Unchanged 6

Showing 92 of 92

All Common Calls Puts

Compact Export CSV

Holder

Value (USD)

% of 13F

MARSHALL WACE, LLP

$7,641,256

7.72%

1,615,488

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Marshall Wace North America L.P. joint	1,563,535	$7,395,519	96.8%	Other
MARSHALL WACE ASIA Ltd	51,953	$245,737	3.2%	Other

FourWorld Capital Management LLC

$7,571,287

7.65%

1,600,695

TWO SIGMA INVESTMENTS, LP

$7,101,801

7.18%

1,501,438

OAKTREE CAPITAL MANAGEMENT LP

$7,095,000

7.17%

1,500,000

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
BROOKFIELD Corp /ON/ joint	1,500,000	$7,095,000	100.0%	Defined

D. E. Shaw & Co., Inc.

$6,611,400

6.68%

1,397,759

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
D. E. SHAW & CO, L.P.	1,397,759	$6,611,400	100.0%	Defined

Caption Management, LLC

$4,730,000

4.78%

1,000,000

NOMURA HOLDINGS INC

$4,730,000

4.78%

1,000,000

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
NOMURA GLOBAL FINANCIAL PRODUCTS INC	1,000,000	$4,730,000	100.0%	Defined

OAKTREE CAPITAL MANAGEMENT LP

$4,730,000

4.78%

1,000,000

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
BROOKFIELD Corp /ON/ joint	1,000,000	$4,730,000	100.0%	Defined

ACADIAN ASSET MANAGEMENT LLC

$4,558,622

4.61%

963,768

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Acadian Inc	963,768	$4,558,622	100.0%	Defined

RENAISSANCE TECHNOLOGIES LLC

$3,129,368

3.16%

661,600

MORGAN STANLEY

$2,573,711

2.60%

544,125

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
MORGAN STANLEY CAPITAL SERVICES, LLC	540,525	$2,556,683	99.3%	Defined
MORGAN STANLEY SMITH BARNEY LLC	3,600	$17,028	0.7%	Defined

SUSQUEHANNA INTERNATIONAL GROUP, LLP

$2,263,305

2.29%

478,500

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
SUSQUEHANNA SECURITIES, LLC	478,500	$2,263,305	100.0%	Other

DIMENSIONAL FUND ADVISORS LP

$2,249,813

2.27%

475,648

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Dimensional Fund Advisors Ltd.	2,962	$14,010	0.6%	Defined
DFA Australia Ltd.	9,900	$46,827	2.1%	Defined
Dimensional Ireland Ltd	30,430	$143,933	6.4%	Defined
Held directly	432,356	$2,045,043	90.9%	Sole

Connor, Clark & Lunn Investment Management Ltd.

$1,952,775

1.97%

412,849

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Manager 1	412,849	$1,952,775	100.0%	Sole

PEAK6 LLC

$1,892,000

1.91%

400,000

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
PEAK6 Investments LLC joint	400,000	$1,892,000	100.0%	Defined

Qube Research & Technologies Ltd

$1,808,671

1.83%

382,383

JANE STREET GROUP, LLC

$1,764,763

1.78%

373,100

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Jane Street Capital, LLC	373,100	$1,764,763	100.0%	Defined

Trexquant Investment LP

$1,352,349

1.37%

285,909

BNP PARIBAS ARBITRAGE, SA

$1,254,140

1.27%

265,146

VANGUARD PORTFOLIO MANAGEMENT LLC

$1,133,752

1.15%

239,694

MILLENNIUM MANAGEMENT LLC

$1,118,276

1.13%

236,422

XTX Topco Ltd

$1,050,991

1.06%

222,197

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
XTX EXECUTION SERVICES LLC joint	222,197	$1,050,991	100.0%	Defined

JANE STREET GROUP, LLC

$1,021,097

1.03%

215,877

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Jane Street Capital, LLC	198,590	$939,330	92.0%	Defined
Jane Street Global Trading, LLC	17,287	$81,767	8.0%	Defined

SUSQUEHANNA INTERNATIONAL GROUP, LLP

$1,018,842

1.03%

215,400

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
SUSQUEHANNA SECURITIES, LLC	215,400	$1,018,842	100.0%	Other

ODDO BHF ASSET MANAGEMENT SAS

$1,017,413

1.03%

215,098

BOOTHBAY FUND MANAGEMENT, LLC

$946,383

0.96%

200,081

GSA CAPITAL PARTNERS LLP

$945,782

0.96%

199,954

Caption Management, LLC

$804,100

0.81%

170,000

MILLENNIUM MANAGEMENT LLC

$761,530

0.77%

161,000

Caption Management, LLC

$757,225

0.77%

160,090

Steward Partners Investment Advisory, LLC

$725,331

0.73%

153,347

CITADEL ADVISORS LLC

$711,392

0.72%

150,400

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Citadel Securities GP LLC	150,400	$711,392	100.0%	Defined

BLUEFIN CAPITAL MANAGEMENT, LLC

$698,611

0.71%

147,698

GROUP ONE TRADING LLC

$557,302

0.56%

117,823

CITADEL ADVISORS LLC

$551,518

0.56%

116,600

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Citadel Securities GP LLC	116,600	$551,518	100.0%	Defined

Virtu Financial LLC

$543,803

0.55%

114,969

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Virtu Americas LLC	114,969	$543,803	100.0%	Defined

CITADEL ADVISORS LLC

$525,232

0.53%

111,043

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Citadel Securities GP LLC	110,890	$524,509	99.9%	Defined
Held directly	153	$723	0.1%	Defined

ALGERT GLOBAL LLC

$524,013

0.53%

110,785

UBS Group AG

$521,888

0.53%

110,336

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
UBS Financial Services Inc	167	$789	0.2%	Defined
UBS AG	110,169	$521,099	99.8%	Defined

Federation des caisses Desjardins du Quebec

$513,082

0.52%

108,474

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Desjardins Securities inc.	1,500	$7,095	1.4%	Defined
Regime de rentes du Mouvement Desjardins	106,974	$505,987	98.6%	Defined

SUSQUEHANNA INTERNATIONAL GROUP, LLP

$511,327

0.52%

108,103

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
SUSQUEHANNA SECURITIES, LLC	108,103	$511,327	100.0%	Other

SILVERBACK ASSET MANAGEMENT LLC

$473,000

0.48%

100,000

GOLDMAN SACHS GROUP INC

$453,337

0.46%

95,843

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
GOLDMAN SACHS & CO. LLC	95,843	$453,337	100.0%	Defined

TUDOR INVESTMENT CORP ET AL

$402,523

0.41%

85,100

JANE STREET GROUP, LLC

$366,575

0.37%

77,500

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Jane Street Capital, LLC	77,500	$366,575	100.0%	Defined

TUDOR INVESTMENT CORP ET AL

$355,237

0.36%

75,103

AMERICAN CENTURY COMPANIES INC

$348,605

0.35%

73,701

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
AMERICAN CENTURY INVESTMENT MANAGEMENT INC	73,701	$348,605	100.0%	Defined

IMC-Chicago, LLC

$321,209

0.32%

67,909

Squarepoint Ops LLC

$319,038

0.32%

67,450

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Squarepoint Capital LLP	67,450	$319,038	100.0%	Defined

FAIRFAX FINANCIAL HOLDINGS LTD/ CAN

$295,625

0.30%

62,500

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
HAMBLIN WATSA INVESTMENT COUNSEL LTD joint	62,500	$295,625	100.0%	Defined

Eurizon Capital SGR S.p.A.

$288,317

0.29%

60,955

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Intesa Sanpaolo S.p.A.	60,955	$288,317	100.0%	Other

BARCLAYS PLC

$283,800

0.29%

60,000

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
BARCLAYS BANK PLC	60,000	$283,800	100.0%	Defined

Polunin Capital Partners Ltd

$282,906

0.29%

59,811

BRIDGEWAY CAPITAL MANAGEMENT, LLC

$218,246

0.22%

46,141

JPMORGAN CHASE & CO

$182,519

0.18%

38,588

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
JPMorgan Chase Bank, N.A.	9,490	$44,887	24.6%	Defined
J.P. Morgan Securities LLC	29,098	$137,632	75.4%	Defined

WINTON GROUP Ltd

$164,026

0.17%

34,678

Yakira Capital Management, Inc.

$164,012

0.17%

34,675

Walleye Capital LLC

$152,779

0.15%

32,300

WESBANCO BANK INC

$141,900

0.14%

30,000

STATE STREET CORP

$135,713

0.14%

28,692

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
SSGA FUNDS MANAGEMENT, INC.	28,692	$135,713	100.0%	Defined

HRT FINANCIAL LP

$134,525

0.14%

28,441

Tower Research Capital LLC (TRC)

$130,765

0.13%

27,646

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Tower Research Capital Investments LLC	600	$2,838	2.2%	Other
Latour Trading LLC (Latour)	27,046	$127,927	97.8%	Defined

CITIGROUP INC

$109,764

0.11%

23,206

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Citigroup Financial Products Inc. joint	23,206	$109,764	100.0%	Defined

GABELLI & Co INVESTMENT ADVISERS, INC.

$106,448

0.11%

22,505

GABELLI FUNDS LLC

$102,499

0.10%

21,670

SUSQUEHANNA FUNDAMENTAL INVESTMENTS, LLC

$90,182

0.09%

19,066

AXQ CAPITAL, LP

$86,142

0.09%

18,212

LPL Financial LLC

$83,650

0.08%

17,685

FOX RUN MANAGEMENT, L.L.C.

$77,860

0.08%

16,461

Accurate Wealth Management, LLC

$70,950

0.07%

15,000

BlackRock, Inc.

$63,272

0.06%

13,377

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
BlackRock Institutional Trust Company, N.A.	9,699	$45,876	72.5%	Sole
BlackRock (Netherlands) B.V.	3,139	$14,847	23.5%	Sole
Aperio Group, LLC	539	$2,549	4.0%	Sole

Owlhouse Capital LP

$62,152

0.06%

13,140

Caitong International Asset Management Co., Ltd

$61,925

0.06%

13,092

BLUEFIN CAPITAL MANAGEMENT, LLC

$55,814

0.06%

11,800

C2P Capital Advisory Group, LLC d.b.a. Prosperity Capital Advisors

$54,276

0.05%

11,475

StoneX Group Inc.

$50,256

0.05%

10,625

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
STONEX FINANCIAL INC.	10,625	$50,256	100.0%	Defined

Centiva Capital, LP

$50,010

0.05%

10,573

Walleye Capital LLC

$49,764

0.05%

10,521

Rockefeller Capital Management L.P.

$47,300

0.05%

10,000

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
ROCKEFELLER FINANCIAL LLC	10,000	$47,300	100.0%	Defined

OSAIC HOLDINGS, INC.

$34,022

0.03%

7,193

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
OSAIC WEALTH, INC.	7,193	$34,022	100.0%	Defined

NFSG Corp

$28,025

0.03%

5,925

SIMPLEX TRADING, LLC

$15,254

0.02%

3,225

BLUEFIN CAPITAL MANAGEMENT, LLC

$15,075

0.02%

60,600

SBI Securities Co., Ltd.

$10,860

0.01%

2,296

NewEdge Advisors, LLC

$4,730

0.00%

1,000

JONES FINANCIAL COMPANIES LLLP

$4,730

0.00%

1,000

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Edward D. Jones & Co., L.P.	1,000	$4,730	100.0%	Sole

Ameritas Advisory Services, LLC

$4,474

0.00%

946

ROYAL BANK OF CANADA

$3,254

0.00%

688

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
RBC Capital Markets, LLC	688	$3,254	100.0%	Defined

TD Waterhouse Canada Inc.

$2,365

0.00%

500

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
TORONTO DOMINION BANK	500	$2,365	100.0%	Defined

SALEM INVESTMENT COUNSELORS INC

$1,419

0.00%

300

Integrated Wealth Concepts LLC

$1,182

0.00%

250

FMR LLC

$175

0.00%

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
STRATEGIC ADVISERS LLC	37	$175	100.0%	Defined

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Columbia Management Investment Advisers, LLC	1,583,589	$4,434,049	100.0%	Defined

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Singer Eric joint	1,383,402	$3,873,525	100.0%	Other

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Leap GP LLC joint	24,124	$67,547	100.0%	Defined

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Quadrature US Inc.	19,169	$53,673	100.0%	Other

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
HSBC BANK PLC	13,097	$36,671	100.0%	Defined

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
PGIM Quantitative Solutions LLC	12,700	$35,560	100.0%	Defined

Key facts CIK 1325702 CUSIP 55933J203 13F (30d) 74 filings 74 filers Visit website Investor relations